<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM – Open Source CRM application.
 * Copyright (C) 2014-2025 EspoCRM, Inc.
 * Website: https://www.espocrm.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Core\Authentication\Oidc\UserProvider;

use Espo\Entities\User;
use Espo\ORM\EntityManager;
use RuntimeException;

class UsernameValidator
{
    public function __construct(private EntityManager $entityManager) {}

    public function validate(string $username): void
    {
        $maxLength = $this->entityManager
            ->getDefs()
            ->getEntity(User::ENTITY_TYPE)
            ->getAttribute('userName')
            ->getLength();

        if ($maxLength && $maxLength < strlen($username)) {
            throw new RuntimeException("Value in username claim exceeds max length of `$maxLength`. " .
                "Increase maxLength parameter for User.userName field (up to 255).");
        }
    }
}
